Safe Joomla 3.x to 4.x Migration — What You Need to Know
Joomla 3 — End of Support and the Consequences
Joomla 3.10 received its final security update in August 2023. Since then, all new vulnerabilities discovered in Joomla 3.x have remained unpatched. For sites still running Joomla 3, this means one thing: every vulnerability discovered is an open door for hackers.
Why Is Migrating to Joomla 4 Not Straightforward?
Joomla 4 is a rewrite of the framework — it is not backward compatible with Joomla 3. This means that:
- Most Joomla 3 extensions do not work on Joomla 4 without an update
- Joomla 3 templates need to be rewritten or replaced
- Some extensions have been abandoned by their developers and will never be updated
This is why many sites have become “stuck” on Joomla 3 — migration requires planning and testing.
A Step-by-Step Plan for a Safe Migration
- Audit extensions — check every installed plugin and template to see whether a Joomla 4 version is available
- Test environment (staging) — never migrate on a live site; set up a copy on a separate domain or subdomain
- Update to Joomla 3.10 — before migrating, make sure you are running the latest Joomla 3 version
- Run the migration component — Joomla 3.10 has a built-in Pre-Update Check and migration component for J4
- Functional testing — check forms, modules, URL routing, and user permissions
- 301 redirects — if URLs change, configure redirects so you do not lose SEO rankings
What If Your Joomla 3 Site Is Infected?
If the site is infected, migration will not solve the problem — malicious code may be carried over along with the database or files. The correct order is: malware removal first, then migration.
If you have a Joomla 3 site and need help with migration or malware removal, we handle both. Learn about our Joomla malware removal service.